Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova

Adam G. Riess; Alexei V. Filippenko; Michael C. Liu; Peter Challis; Alejandro Clocchiatti; Alan Diercks; Peter M. Garnavich; Craig J. Hogan; Saurabh Jha; Robert P. Kirshner; B. Leibundgut; M. M. Phillips; David Reiss; Brian P. Schmidt; Robert A. Schommer; R. Chris Smith; J. Spyromilio; Christopher Stubbs; Nicholas B. Suntzeff; John Tonry; Patrick Woudt; Robert J. Brunner; Arjun Dey; Roy Gal; James Graham; James Larkin; Steve C. Odewah n; Ben Oppenheimer

doi:10.1086/308939

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arXiv · astro-ph/0001384

Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova

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Abstract

We have measured the rest-frame B,V, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z=0.46), using HST and ground-based near-infrared detectors. A goal of this study is the measurement of the color excess, E_{B-I}, which is a sensitive indicator of interstellar or intergalactic dust which could affect recent cosmological measurements from high-redshift SNe Ia. Our observations disfavor a 30% opacity of SN Ia visual light by dust as an alternative to an accelerating Universe. This statement applies to both Galactic-type dust (rejected at the 3.4 sigma confidence level) and greyer dust (grain size > 0.1 microns; rejected at the 2.3 to 2.6 sigma confidence level) as proposed by Aguirre (1999). The rest-frame $I$-band light cur ve shows the secondary maximum a month after B maximum typical of nearby SNe Ia of normal luminosi ty, providing no indication of evolution as a function of redshift out to z~0.5. A n expanded set of similar observations could improve the constraints on any contribution of extragalactic dust to the dimming of high-redshift SNe Ia.

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Adam G. Riess, Alexei V. Filippenko, Michael C. Liu, Peter Challis, Alejandro Clocchiatti, Alan Diercks, Peter M. Garnavich, Craig J. Hogan, Saurabh Jha, Robert P. Kirshner, B. Leibundgut, M. M. Phillips, David Reiss, Brian P. Schmidt, Robert A. Schommer, R. Chris Smith, J. Spyromilio, Christopher Stubbs, Nicholas B. Suntzeff, John Tonry, Patrick Woudt, Robert J. Brunner, Arjun Dey, Roy Gal, James Graham, James Larkin, Steve C. Odewah n, Ben Oppenheimer. 2000-01-21. Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova. https://doi.org/10.1086/308939

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